REFRIGERANT SYSTEM REPAIR INSTRUCTIONS
Section I. CHARGING THE REFRIGERANT SYSTEM
This section describes the methods used to charge, discharge and add oil to the refrigerant system; and to check
the system for refrigerant leakage.
Make sure the refrigerant charging apparatus (fig. 7-1) is clean and in operational condition.
When adding oil use a clean, moisture-free oil container. Cap oil container immediately after use to eliminate
moisture contamination of the oil.
Precautions When Handling Refrigerant
Although refrigerant-12 is one of the safest refrigerants to handle, it is important that personnel observe the following
precautions in handling the refrigerant.
Do not discharge refrigerant-12 into areas having exposed flames. A heavy concentration of refrigerant in contact
with a live flame produces a gas which is toxic and attacks bright metal surfaces.
Refrigerant pressure hose
Refrigerant-12 bottle valve
Refrigerant control valve
Vacuum pump shutoff valve
Vacuum control valve
Evacuation and charge hose
Figure 7-1. Refrigerant charging apparatus.